gsth265parser.c 87.5 KB
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/* Gstreamer H.265 bitstream parser
 * Copyright (C) 2012 Intel Corporation
 * Copyright (C) 2013 Sreerenj Balachandran <sreerenj.balachandran@intel.com>
 *
 *  Contact: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

/**
 * SECTION:gsth265parser
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 * @title: GstH265Parser
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 * @short_description: Convenience library for h265 video bitstream parsing.
 *
 * It offers you bitstream parsing in HEVC mode and non-HEVC mode. To identify
 * Nals in a bitstream and parse its headers, you should call:
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 *
 *   * gst_h265_parser_identify_nalu() to identify the following nalu in
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 *        non-HEVC bitstreams
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 *
 *   * gst_h265_parser_identify_nalu_hevc() to identify the nalu in
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 *        HEVC bitstreams
 *
 * Then, depending on the #GstH265NalUnitType of the newly parsed #GstH265NalUnit,
 * you should call the differents functions to parse the structure:
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 *
 *   * From #GST_H265_NAL_SLICE_TRAIL_N to #GST_H265_NAL_SLICE_CRA_NUT: gst_h265_parser_parse_slice_hdr()
 *
 *   * #GST_H265_NAL_SEI: gst_h265_parser_parse_sei()
 *
 *   * #GST_H265_NAL_VPS: gst_h265_parser_parse_vps()
 *
 *   * #GST_H265_NAL_SPS: gst_h265_parser_parse_sps()
 *
 *   * #GST_H265_NAL_PPS: #gst_h265_parser_parse_pps()
 *
 *   * Any other: gst_h265_parser_parse_nal()
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 *
 * Note: You should always call gst_h265_parser_parse_nal() if you don't
 * actually need #GstH265NalUnitType to be parsed for your personal use, in
 * order to guarantee that the #GstH265Parser is always up to date.
 *
 * For more details about the structures, look at the ITU-T H.265
 * specifications, you can download them from:
 *
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 *   * ITU-T H.265: http://www.itu.int/rec/T-REC-H.265
 *
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 */

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

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#include "nalutils.h"
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#include "gsth265parser.h"

#include <gst/base/gstbytereader.h>
#include <gst/base/gstbitreader.h>
#include <string.h>
#include <math.h>

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GST_DEBUG_CATEGORY_STATIC (h265_parser_debug);
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#define GST_CAT_DEFAULT h265_parser_debug

static gboolean initialized = FALSE;
#define INITIALIZE_DEBUG_CATEGORY \
  if (!initialized) { \
    GST_DEBUG_CATEGORY_INIT (h265_parser_debug, "codecparsers_h265", 0, \
        "h265 parser library"); \
    initialized = TRUE; \
  }

/**** Default scaling_lists according to Table 7-5 and 7-6 *****/

/* Table 7-5 */
static const guint8 default_scaling_list0[16] = {
  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
  16, 16, 16, 16
};

/*  Combined the values in Table  7-6 to make the calculation easier
 *  Default scaling list of 8x8 and 16x16 matrices for matrixId = 0, 1 and 2
 *  Default scaling list of 32x32 matrix for matrixId = 0
 */
static const guint8 default_scaling_list1[64] = {
  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 16,
  17, 16, 17, 18, 17, 18, 18, 17, 18, 21, 19, 20,
  21, 20, 19, 21, 24, 22, 22, 24, 24, 22, 22, 24,
  25, 25, 27, 30, 27, 25, 25, 29, 31, 35, 35, 31,
  29, 36, 41, 44, 41, 36, 47, 54, 54, 47, 65, 70,
  65, 88, 88, 115
};

/*  Combined the values in Table 7-6 to make the calculation easier
 *  Default scaling list of 8x8 and 16x16 matrices for matrixId = 3, 4 and 5
 *  Default scaling list of 32x32 matrix for matrixId = 1
 */
static const guint8 default_scaling_list2[64] = {
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  16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17,
  17, 17, 17, 18, 18, 18, 18, 18, 18, 20, 20, 20,
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  20, 20, 20, 20, 24, 24, 24, 24, 24, 24, 24, 24,
  25, 25, 25, 25, 25, 25, 25, 28, 28, 28, 28, 28,
  28, 33, 33, 33, 33, 33, 41, 41, 41, 41, 54, 54,
  54, 71, 71, 91
};

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static const guint8 zigzag_4x4[16] = {
  0, 1, 4, 8,
  5, 2, 3, 6,
  9, 12, 13, 10,
  7, 11, 14, 15,
};

static const guint8 zigzag_8x8[64] = {
  0, 1, 8, 16, 9, 2, 3, 10,
  17, 24, 32, 25, 18, 11, 4, 5,
  12, 19, 26, 33, 40, 48, 41, 34,
  27, 20, 13, 6, 7, 14, 21, 28,
  35, 42, 49, 56, 57, 50, 43, 36,
  29, 22, 15, 23, 30, 37, 44, 51,
  58, 59, 52, 45, 38, 31, 39, 46,
  53, 60, 61, 54, 47, 55, 62, 63
};

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static const guint8 uprightdiagonal_4x4[16] = {
  0, 4, 1, 8,
  5, 2, 12, 9,
  6, 3, 13, 10,
  7, 14, 11, 15
};

static const guint8 uprightdiagonal_8x8[64] = {
  0, 8, 1, 16, 9, 2, 24, 17,
  10, 3, 32, 25, 18, 11, 4, 40,
  33, 26, 19, 12, 5, 48, 41, 34,
  27, 20, 13, 6, 56, 49, 42, 35,
  28, 21, 14, 7, 57, 50, 43, 36,
  29, 22, 15, 58, 51, 44, 37, 30,
  23, 59, 52, 45, 38, 31, 60, 53,
  46, 39, 61, 54, 47, 62, 55, 63
};

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typedef struct
{
  guint par_n, par_d;
} PAR;

/* Table E-1 - Meaning of sample aspect ratio indicator (1..16) */
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static const PAR aspect_ratios[17] = {
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  {0, 0},
  {1, 1},
  {12, 11},
  {10, 11},
  {16, 11},
  {40, 33},
  {24, 11},
  {20, 11},
  {32, 11},
  {80, 33},
  {18, 11},
  {15, 11},
  {64, 33},
  {160, 99},
  {4, 3},
  {3, 2},
  {2, 1}
};

/*****  Utils ****/
#define EXTENDED_SAR 255

static GstH265VPS *
gst_h265_parser_get_vps (GstH265Parser * parser, guint8 vps_id)
{
  GstH265VPS *vps;

  vps = &parser->vps[vps_id];

  if (vps->valid)
    return vps;

  return NULL;
}

static GstH265SPS *
gst_h265_parser_get_sps (GstH265Parser * parser, guint8 sps_id)
{
  GstH265SPS *sps;

  sps = &parser->sps[sps_id];

  if (sps->valid)
    return sps;

  return NULL;
}

static GstH265PPS *
gst_h265_parser_get_pps (GstH265Parser * parser, guint8 pps_id)
{
  GstH265PPS *pps;

  pps = &parser->pps[pps_id];

  if (pps->valid)
    return pps;

  return NULL;
}

static gboolean
gst_h265_parse_nalu_header (GstH265NalUnit * nalu)
{
  guint8 *data = nalu->data + nalu->offset;
  GstBitReader br;

  if (nalu->size < 2)
    return FALSE;

  gst_bit_reader_init (&br, data, nalu->size - nalu->offset);

  /* skip the forbidden_zero_bit */
  gst_bit_reader_skip_unchecked (&br, 1);

  nalu->type = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
  nalu->layer_id = gst_bit_reader_get_bits_uint8_unchecked (&br, 6);
  nalu->temporal_id_plus1 = gst_bit_reader_get_bits_uint8_unchecked (&br, 3);
  nalu->header_bytes = 2;

  return TRUE;
}

/****** Parsing functions *****/

static gboolean
gst_h265_parse_profile_tier_level (GstH265ProfileTierLevel * ptl,
    NalReader * nr, guint8 maxNumSubLayersMinus1)
{
  guint i, j;
  GST_DEBUG ("parsing \"ProfileTierLevel parameters\"");

  READ_UINT8 (nr, ptl->profile_space, 2);
  READ_UINT8 (nr, ptl->tier_flag, 1);
  READ_UINT8 (nr, ptl->profile_idc, 5);

  for (j = 0; j < 32; j++)
    READ_UINT8 (nr, ptl->profile_compatibility_flag[j], 1);

  READ_UINT8 (nr, ptl->progressive_source_flag, 1);
  READ_UINT8 (nr, ptl->interlaced_source_flag, 1);
  READ_UINT8 (nr, ptl->non_packed_constraint_flag, 1);
  READ_UINT8 (nr, ptl->frame_only_constraint_flag, 1);

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  READ_UINT8 (nr, ptl->max_12bit_constraint_flag, 1);
  READ_UINT8 (nr, ptl->max_10bit_constraint_flag, 1);
  READ_UINT8 (nr, ptl->max_8bit_constraint_flag, 1);
  READ_UINT8 (nr, ptl->max_422chroma_constraint_flag, 1);
  READ_UINT8 (nr, ptl->max_420chroma_constraint_flag, 1);
  READ_UINT8 (nr, ptl->max_monochrome_constraint_flag, 1);
  READ_UINT8 (nr, ptl->intra_constraint_flag, 1);
  READ_UINT8 (nr, ptl->one_picture_only_constraint_flag, 1);
  READ_UINT8 (nr, ptl->lower_bit_rate_constraint_flag, 1);
  READ_UINT8 (nr, ptl->max_14bit_constraint_flag, 1);

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  /* skip the reserved zero bits */
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  if (!nal_reader_skip (nr, 34))
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    goto error;

  READ_UINT8 (nr, ptl->level_idc, 8);
  for (j = 0; j < maxNumSubLayersMinus1; j++) {
    READ_UINT8 (nr, ptl->sub_layer_profile_present_flag[j], 1);
    READ_UINT8 (nr, ptl->sub_layer_level_present_flag[j], 1);
  }

  if (maxNumSubLayersMinus1 > 0) {
    for (i = maxNumSubLayersMinus1; i < 8; i++)
      if (!nal_reader_skip (nr, 2))
        goto error;
  }

  for (i = 0; i < maxNumSubLayersMinus1; i++) {
    if (ptl->sub_layer_profile_present_flag[i]) {
      READ_UINT8 (nr, ptl->sub_layer_profile_space[i], 2);
      READ_UINT8 (nr, ptl->sub_layer_tier_flag[i], 1);
      READ_UINT8 (nr, ptl->sub_layer_profile_idc[i], 5);

      for (j = 0; j < 32; j++)
        READ_UINT8 (nr, ptl->sub_layer_profile_compatibility_flag[i][j], 1);

      READ_UINT8 (nr, ptl->sub_layer_progressive_source_flag[i], 1);
      READ_UINT8 (nr, ptl->sub_layer_interlaced_source_flag[i], 1);
      READ_UINT8 (nr, ptl->sub_layer_non_packed_constraint_flag[i], 1);
      READ_UINT8 (nr, ptl->sub_layer_frame_only_constraint_flag[i], 1);

      if (!nal_reader_skip (nr, 44))
        goto error;
    }

    if (ptl->sub_layer_level_present_flag[i])
      READ_UINT8 (nr, ptl->sub_layer_level_idc[i], 8);
  }

  return TRUE;

error:
  GST_WARNING ("error parsing \"ProfileTierLevel Parameters\"");
  return FALSE;
}

static gboolean
gst_h265_parse_sub_layer_hrd_parameters (GstH265SubLayerHRDParams * sub_hrd,
    NalReader * nr, guint8 CpbCnt, guint8 sub_pic_hrd_params_present_flag)
{
  guint i;

  GST_DEBUG ("parsing \"SubLayer HRD Parameters\"");

  for (i = 0; i <= CpbCnt; i++) {
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    READ_UE_MAX (nr, sub_hrd->bit_rate_value_minus1[i], G_MAXUINT32 - 1);
    READ_UE_MAX (nr, sub_hrd->cpb_size_value_minus1[i], G_MAXUINT32 - 1);
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    if (sub_pic_hrd_params_present_flag) {
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      READ_UE_MAX (nr, sub_hrd->cpb_size_du_value_minus1[i], G_MAXUINT32 - 1);
      READ_UE_MAX (nr, sub_hrd->bit_rate_du_value_minus1[i], G_MAXUINT32 - 1);
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    }

    READ_UINT8 (nr, sub_hrd->cbr_flag[i], 1);
  }

  return TRUE;

error:
  GST_WARNING ("error parsing \"SubLayerHRD Parameters \"");
  return FALSE;
}

static gboolean
gst_h265_parse_hrd_parameters (GstH265HRDParams * hrd, NalReader * nr,
    guint8 commonInfPresentFlag, guint8 maxNumSubLayersMinus1)
{
  guint i;

  GST_DEBUG ("parsing \"HRD Parameters\"");

  /* set default values for fields that might not be present in the bitstream
     and have valid defaults */
  hrd->initial_cpb_removal_delay_length_minus1 = 23;
  hrd->au_cpb_removal_delay_length_minus1 = 23;
  hrd->dpb_output_delay_length_minus1 = 23;

  if (commonInfPresentFlag) {
    READ_UINT8 (nr, hrd->nal_hrd_parameters_present_flag, 1);
    READ_UINT8 (nr, hrd->vcl_hrd_parameters_present_flag, 1);

    if (hrd->nal_hrd_parameters_present_flag
        || hrd->vcl_hrd_parameters_present_flag) {

      READ_UINT8 (nr, hrd->sub_pic_hrd_params_present_flag, 1);

      if (hrd->sub_pic_hrd_params_present_flag) {
        READ_UINT8 (nr, hrd->tick_divisor_minus2, 8);
        READ_UINT8 (nr, hrd->du_cpb_removal_delay_increment_length_minus1, 5);
        READ_UINT8 (nr, hrd->sub_pic_cpb_params_in_pic_timing_sei_flag, 1);
        READ_UINT8 (nr, hrd->dpb_output_delay_du_length_minus1, 5);
      }

      READ_UINT8 (nr, hrd->bit_rate_scale, 4);
      READ_UINT8 (nr, hrd->cpb_size_scale, 4);

      if (hrd->sub_pic_hrd_params_present_flag)
        READ_UINT8 (nr, hrd->cpb_size_du_scale, 4);

      READ_UINT8 (nr, hrd->initial_cpb_removal_delay_length_minus1, 5);
      READ_UINT8 (nr, hrd->au_cpb_removal_delay_length_minus1, 5);
      READ_UINT8 (nr, hrd->dpb_output_delay_length_minus1, 5);
    }
  }

  for (i = 0; i <= maxNumSubLayersMinus1; i++) {
    READ_UINT8 (nr, hrd->fixed_pic_rate_general_flag[i], 1);

    if (!hrd->fixed_pic_rate_general_flag[i]) {
      READ_UINT8 (nr, hrd->fixed_pic_rate_within_cvs_flag[i], 1);
    } else
      hrd->fixed_pic_rate_within_cvs_flag[i] = 1;

    if (hrd->fixed_pic_rate_within_cvs_flag[i]) {
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      READ_UE_MAX (nr, hrd->elemental_duration_in_tc_minus1[i], 2047);
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    } else
      READ_UINT8 (nr, hrd->low_delay_hrd_flag[i], 1);

    if (!hrd->low_delay_hrd_flag[i])
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      READ_UE_MAX (nr, hrd->cpb_cnt_minus1[i], 31);
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    if (hrd->nal_hrd_parameters_present_flag)
      if (!gst_h265_parse_sub_layer_hrd_parameters (&hrd->sublayer_hrd_params
              [i], nr, hrd->cpb_cnt_minus1[i],
              hrd->sub_pic_hrd_params_present_flag))
        goto error;

    if (hrd->vcl_hrd_parameters_present_flag)
      if (!gst_h265_parse_sub_layer_hrd_parameters (&hrd->sublayer_hrd_params
              [i], nr, hrd->cpb_cnt_minus1[i],
              hrd->sub_pic_hrd_params_present_flag))
        goto error;
  }

  return TRUE;

error:
  GST_WARNING ("error parsing \"HRD Parameters\"");
  return FALSE;
}

static gboolean
gst_h265_parse_vui_parameters (GstH265SPS * sps, NalReader * nr)
{
  GstH265VUIParams *vui = &sps->vui_params;

  GST_DEBUG ("parsing \"VUI Parameters\"");

  /* set default values for fields that might not be present in the bitstream
     and have valid defaults */
  vui->video_format = 5;
  vui->colour_primaries = 2;
  vui->transfer_characteristics = 2;
  vui->matrix_coefficients = 2;
  vui->motion_vectors_over_pic_boundaries_flag = 1;
  vui->max_bytes_per_pic_denom = 2;
  vui->max_bits_per_min_cu_denom = 1;
  vui->log2_max_mv_length_horizontal = 15;
  vui->log2_max_mv_length_vertical = 15;

  if (sps && sps->profile_tier_level.progressive_source_flag
      && sps->profile_tier_level.interlaced_source_flag)
    vui->frame_field_info_present_flag = 1;

  READ_UINT8 (nr, vui->aspect_ratio_info_present_flag, 1);
  if (vui->aspect_ratio_info_present_flag) {
    READ_UINT8 (nr, vui->aspect_ratio_idc, 8);
    if (vui->aspect_ratio_idc == EXTENDED_SAR) {
      READ_UINT16 (nr, vui->sar_width, 16);
      READ_UINT16 (nr, vui->sar_height, 16);
      vui->par_n = vui->sar_width;
      vui->par_d = vui->sar_height;
    } else if (vui->aspect_ratio_idc <= 16) {
      vui->par_n = aspect_ratios[vui->aspect_ratio_idc].par_n;
      vui->par_d = aspect_ratios[vui->aspect_ratio_idc].par_d;
    }
  }

  READ_UINT8 (nr, vui->overscan_info_present_flag, 1);
  if (vui->overscan_info_present_flag)
    READ_UINT8 (nr, vui->overscan_appropriate_flag, 1);

  READ_UINT8 (nr, vui->video_signal_type_present_flag, 1);
  if (vui->video_signal_type_present_flag) {

    READ_UINT8 (nr, vui->video_format, 3);
    READ_UINT8 (nr, vui->video_full_range_flag, 1);
    READ_UINT8 (nr, vui->colour_description_present_flag, 1);
    if (vui->colour_description_present_flag) {
      READ_UINT8 (nr, vui->colour_primaries, 8);
      READ_UINT8 (nr, vui->transfer_characteristics, 8);
      READ_UINT8 (nr, vui->matrix_coefficients, 8);
    }
  }

  READ_UINT8 (nr, vui->chroma_loc_info_present_flag, 1);
  if (vui->chroma_loc_info_present_flag) {
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    READ_UE_MAX (nr, vui->chroma_sample_loc_type_top_field, 5);
    READ_UE_MAX (nr, vui->chroma_sample_loc_type_bottom_field, 5);
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  }

  READ_UINT8 (nr, vui->neutral_chroma_indication_flag, 1);
  READ_UINT8 (nr, vui->field_seq_flag, 1);
  READ_UINT8 (nr, vui->frame_field_info_present_flag, 1);

  READ_UINT8 (nr, vui->default_display_window_flag, 1);
  if (vui->default_display_window_flag) {
    READ_UE (nr, vui->def_disp_win_left_offset);
    READ_UE (nr, vui->def_disp_win_right_offset);
    READ_UE (nr, vui->def_disp_win_top_offset);
    READ_UE (nr, vui->def_disp_win_bottom_offset);
  }

  READ_UINT8 (nr, vui->timing_info_present_flag, 1);
  if (vui->timing_info_present_flag) {
    READ_UINT32 (nr, vui->num_units_in_tick, 32);
    if (vui->num_units_in_tick == 0)
      GST_WARNING ("num_units_in_tick = 0 detected in stream "
          "(incompliant to H.265 E.2.1).");

    READ_UINT32 (nr, vui->time_scale, 32);
    if (vui->time_scale == 0)
      GST_WARNING ("time_scale = 0 detected in stream "
          "(incompliant to H.265 E.2.1).");

    READ_UINT8 (nr, vui->poc_proportional_to_timing_flag, 1);
    if (vui->poc_proportional_to_timing_flag)
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      READ_UE_MAX (nr, vui->num_ticks_poc_diff_one_minus1, G_MAXUINT32 - 1);
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    READ_UINT8 (nr, vui->hrd_parameters_present_flag, 1);
    if (vui->hrd_parameters_present_flag)
      if (!gst_h265_parse_hrd_parameters (&vui->hrd_params, nr, 1,
              sps->max_sub_layers_minus1))
        goto error;
  }

  READ_UINT8 (nr, vui->bitstream_restriction_flag, 1);
  if (vui->bitstream_restriction_flag) {
    READ_UINT8 (nr, vui->tiles_fixed_structure_flag, 1);
    READ_UINT8 (nr, vui->motion_vectors_over_pic_boundaries_flag, 1);
    READ_UINT8 (nr, vui->restricted_ref_pic_lists_flag, 1);
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    READ_UE_MAX (nr, vui->min_spatial_segmentation_idc, 4096);
    READ_UE_MAX (nr, vui->max_bytes_per_pic_denom, 16);
    READ_UE_MAX (nr, vui->max_bits_per_min_cu_denom, 16);
    READ_UE_MAX (nr, vui->log2_max_mv_length_horizontal, 16);
    READ_UE_MAX (nr, vui->log2_max_mv_length_vertical, 15);
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  }

  return TRUE;

error:
  GST_WARNING ("error parsing \"VUI Parameters\"");
  return FALSE;
}

static gboolean
get_scaling_list_params (GstH265ScalingList * dest_scaling_list,
    guint8 sizeId, guint8 matrixId, guint8 ** sl, guint8 * size,
    gint16 ** scaling_list_dc_coef_minus8)
{
  switch (sizeId) {
    case GST_H265_QUANT_MATIX_4X4:
      *sl = dest_scaling_list->scaling_lists_4x4[matrixId];
      if (size)
        *size = 16;
      break;
    case GST_H265_QUANT_MATIX_8X8:
      *sl = dest_scaling_list->scaling_lists_8x8[matrixId];
      if (size)
        *size = 64;
      break;
    case GST_H265_QUANT_MATIX_16X16:
      *sl = dest_scaling_list->scaling_lists_16x16[matrixId];
      if (size)
        *size = 64;
      if (scaling_list_dc_coef_minus8)
        *scaling_list_dc_coef_minus8 =
            dest_scaling_list->scaling_list_dc_coef_minus8_16x16;
      break;
    case GST_H265_QUANT_MATIX_32X32:
      *sl = dest_scaling_list->scaling_lists_32x32[matrixId];
      if (size)
        *size = 64;
      if (scaling_list_dc_coef_minus8)
        *scaling_list_dc_coef_minus8 =
            dest_scaling_list->scaling_list_dc_coef_minus8_32x32;
      break;
    default:
      return FALSE;
  }
  return TRUE;
}

static gboolean
get_default_scaling_lists (guint8 ** sl, guint8 sizeId, guint8 matrixId)
{
  switch (sizeId) {
    case GST_H265_QUANT_MATIX_4X4:
      memcpy (*sl, default_scaling_list0, 16);
      break;

    case GST_H265_QUANT_MATIX_8X8:
    case GST_H265_QUANT_MATIX_16X16:
590
      if (matrixId <= 2)
591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648
        memcpy (*sl, default_scaling_list1, 64);
      else
        memcpy (*sl, default_scaling_list2, 64);
      break;

    case GST_H265_QUANT_MATIX_32X32:
      if (matrixId == 0)
        memcpy (*sl, default_scaling_list1, 64);
      else
        memcpy (*sl, default_scaling_list2, 64);
      break;

    default:
      return FALSE;
      break;
  }
  return TRUE;
}

static gboolean
gst_h265_parser_parse_scaling_lists (NalReader * nr,
    GstH265ScalingList * dest_scaling_list, gboolean use_default)
{
  guint8 sizeId;
  guint8 matrixId;
  guint8 scaling_list_pred_mode_flag = 0;
  guint8 scaling_list_pred_matrix_id_delta = 0;
  guint8 size, i;

  GST_DEBUG ("parsing scaling lists");

  for (sizeId = 0; sizeId < 4; sizeId++) {
    for (matrixId = 0; matrixId < ((sizeId == 3) ? 2 : 6); matrixId++) {
      gint16 *scaling_list_dc_coef_minus8 = NULL;
      guint8 *sl;

      if (!get_scaling_list_params (dest_scaling_list, sizeId, matrixId, &sl,
              &size, &scaling_list_dc_coef_minus8))
        goto error;

      /* use_default_scaling_matrices forcefully which means,
       * sps_scaling_list_enabled_flag=TRUE,
       * sps_scaling_list_data_present_flag=FALSE,
       * pps_scaling_list_data_present_falg=FALSE */
      if (use_default) {
        if (!get_default_scaling_lists (&sl, sizeId, matrixId))
          goto error;

        /* Inferring the value of scaling_list_dc_coef_minus8 */
        if (sizeId > 1)
          scaling_list_dc_coef_minus8[matrixId] = 8;

      } else {
        READ_UINT8 (nr, scaling_list_pred_mode_flag, 1);

        if (!scaling_list_pred_mode_flag) {
          guint8 refMatrixId;

649
          READ_UE_MAX (nr, scaling_list_pred_matrix_id_delta, matrixId);
650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709

          if (!scaling_list_pred_matrix_id_delta) {
            if (!get_default_scaling_lists (&sl, sizeId, matrixId))
              goto error;

            /* Inferring the value of scaling_list_dc_coef_minus8 */
            if (sizeId > 1)
              scaling_list_dc_coef_minus8[matrixId] = 8;

          } else {
            guint8 *temp_sl;

            refMatrixId = matrixId - scaling_list_pred_matrix_id_delta; /* 7-30 */

            if (!get_scaling_list_params (dest_scaling_list, sizeId,
                    refMatrixId, &temp_sl, NULL, NULL))
              goto error;

            for (i = 0; i < size; i++)
              sl[i] = temp_sl[i];       /* 7-31 */


            /* Inferring the value of scaling_list_dc_coef_minus8 */
            if (sizeId > 1)
              scaling_list_dc_coef_minus8[matrixId] =
                  scaling_list_dc_coef_minus8[refMatrixId];
          }
        } else {
          guint8 nextCoef = 8;
          gint8 scaling_list_delta_coef;

          if (sizeId > 1) {
            READ_SE_ALLOWED (nr, scaling_list_dc_coef_minus8[matrixId], -7,
                247);
            nextCoef = scaling_list_dc_coef_minus8[matrixId] + 8;
          }

          for (i = 0; i < size; i++) {
            READ_SE_ALLOWED (nr, scaling_list_delta_coef, -128, 127);
            nextCoef = (nextCoef + scaling_list_delta_coef) & 0xff;
            sl[i] = nextCoef;
          }
        }
      }
    }
  }

  return TRUE;

error:
  GST_WARNING ("error parsing scaling lists");
  return FALSE;
}

static gboolean
gst_h265_parser_parse_short_term_ref_pic_sets (GstH265ShortTermRefPicSet *
    stRPS, NalReader * nr, guint8 stRpsIdx, GstH265SPS * sps)
{
  guint8 num_short_term_ref_pic_sets;
  guint8 RefRpsIdx = 0;
710
  gint16 deltaRps = 0;
711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733
  guint8 use_delta_flag[16] = { 0 };
  guint8 used_by_curr_pic_flag[16] = { 0 };
  guint32 delta_poc_s0_minus1[16] = { 0 };
  guint32 delta_poc_s1_minus1[16] = { 0 };
  gint j, i = 0;
  gint dPoc;

  GST_DEBUG ("parsing \"ShortTermRefPicSetParameters\"");

  /* set default values for fields that might not be present in the bitstream
     and have valid defaults */
  for (j = 0; j < 16; j++)
    use_delta_flag[j] = 1;

  num_short_term_ref_pic_sets = sps->num_short_term_ref_pic_sets;

  if (stRpsIdx != 0)
    READ_UINT8 (nr, stRPS->inter_ref_pic_set_prediction_flag, 1);

  if (stRPS->inter_ref_pic_set_prediction_flag) {
    GstH265ShortTermRefPicSet *RefRPS;

    if (stRpsIdx == num_short_term_ref_pic_sets)
734
      READ_UE_MAX (nr, stRPS->delta_idx_minus1, stRpsIdx - 1);
735 736

    READ_UINT8 (nr, stRPS->delta_rps_sign, 1);
737
    READ_UE_MAX (nr, stRPS->abs_delta_rps_minus1, 32767);
738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797

    RefRpsIdx = stRpsIdx - stRPS->delta_idx_minus1 - 1; /* 7-45 */
    deltaRps = (1 - 2 * stRPS->delta_rps_sign) * (stRPS->abs_delta_rps_minus1 + 1);     /* 7-46 */

    RefRPS = &sps->short_term_ref_pic_set[RefRpsIdx];

    for (j = 0; j <= RefRPS->NumDeltaPocs; j++) {
      READ_UINT8 (nr, used_by_curr_pic_flag[j], 1);
      if (!used_by_curr_pic_flag[j])
        READ_UINT8 (nr, use_delta_flag[j], 1);
    }

    /* 7-47: calcuate NumNegativePics, DeltaPocS0 and UsedByCurrPicS0 */
    i = 0;
    for (j = (RefRPS->NumPositivePics - 1); j >= 0; j--) {
      dPoc = RefRPS->DeltaPocS1[j] + deltaRps;
      if (dPoc < 0 && use_delta_flag[RefRPS->NumNegativePics + j]) {
        stRPS->DeltaPocS0[i] = dPoc;
        stRPS->UsedByCurrPicS0[i++] =
            used_by_curr_pic_flag[RefRPS->NumNegativePics + j];
      }
    }
    if (deltaRps < 0 && use_delta_flag[RefRPS->NumDeltaPocs]) {
      stRPS->DeltaPocS0[i] = deltaRps;
      stRPS->UsedByCurrPicS0[i++] = used_by_curr_pic_flag[RefRPS->NumDeltaPocs];
    }
    for (j = 0; j < RefRPS->NumNegativePics; j++) {
      dPoc = RefRPS->DeltaPocS0[j] + deltaRps;
      if (dPoc < 0 && use_delta_flag[j]) {
        stRPS->DeltaPocS0[i] = dPoc;
        stRPS->UsedByCurrPicS0[i++] = used_by_curr_pic_flag[j];
      }
    }
    stRPS->NumNegativePics = i;

    /* 7-48: calcuate NumPositivePics, DeltaPocS1 and UsedByCurrPicS1 */
    i = 0;
    for (j = (RefRPS->NumNegativePics - 1); j >= 0; j--) {
      dPoc = RefRPS->DeltaPocS0[j] + deltaRps;
      if (dPoc > 0 && use_delta_flag[j]) {
        stRPS->DeltaPocS1[i] = dPoc;
        stRPS->UsedByCurrPicS1[i++] = used_by_curr_pic_flag[j];
      }
    }
    if (deltaRps > 0 && use_delta_flag[RefRPS->NumDeltaPocs]) {
      stRPS->DeltaPocS1[i] = deltaRps;
      stRPS->UsedByCurrPicS1[i++] = used_by_curr_pic_flag[RefRPS->NumDeltaPocs];
    }
    for (j = 0; j < RefRPS->NumPositivePics; j++) {
      dPoc = RefRPS->DeltaPocS1[j] + deltaRps;
      if (dPoc > 0 && use_delta_flag[RefRPS->NumNegativePics + j]) {
        stRPS->DeltaPocS1[i] = dPoc;
        stRPS->UsedByCurrPicS1[i++] =
            used_by_curr_pic_flag[RefRPS->NumNegativePics + j];
      }
    }
    stRPS->NumPositivePics = i;

  } else {
    /* 7-49 */
798
    READ_UE_MAX (nr, stRPS->NumNegativePics,
799 800 801
        sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1]);

    /* 7-50 */
802
    READ_UE_MAX (nr, stRPS->NumPositivePics,
803 804 805 806
        (sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1] -
            stRPS->NumNegativePics));

    for (i = 0; i < stRPS->NumNegativePics; i++) {
807
      READ_UE_MAX (nr, delta_poc_s0_minus1[i], 32767);
808 809 810 811 812 813 814 815 816 817 818 819 820 821
      /* 7-51 */
      READ_UINT8 (nr, stRPS->UsedByCurrPicS0[i], 1);

      if (i == 0) {
        /* 7-53 */
        stRPS->DeltaPocS0[i] = -(delta_poc_s0_minus1[i] + 1);
      } else {
        /* 7-55 */
        stRPS->DeltaPocS0[i] =
            stRPS->DeltaPocS0[i - 1] - (delta_poc_s0_minus1[i] + 1);
      }
    }

    for (j = 0; j < stRPS->NumPositivePics; j++) {
822
      READ_UE_MAX (nr, delta_poc_s1_minus1[j], 32767);
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837

      /* 7-52 */
      READ_UINT8 (nr, stRPS->UsedByCurrPicS1[j], 1);

      if (j == 0) {
        /* 7-54 */
        stRPS->DeltaPocS1[j] = delta_poc_s1_minus1[j] + 1;
      } else {
        /* 7-56 */
        stRPS->DeltaPocS1[j] =
            stRPS->DeltaPocS1[j - 1] + (delta_poc_s1_minus1[j] + 1);
      }
    }

  }
838 839 840 841

  /* 7-57 */
  stRPS->NumDeltaPocs = stRPS->NumPositivePics + stRPS->NumNegativePics;

842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859
  return TRUE;

error:
  GST_WARNING ("error parsing \"ShortTermRefPicSet Parameters\"");
  return FALSE;
}

static gboolean
gst_h265_slice_parse_ref_pic_list_modification (GstH265SliceHdr * slice,
    NalReader * nr, gint NumPocTotalCurr)
{
  guint i;
  GstH265RefPicListModification *rpl_mod = &slice->ref_pic_list_modification;
  const guint n = ceil_log2 (NumPocTotalCurr);

  READ_UINT8 (nr, rpl_mod->ref_pic_list_modification_flag_l0, 1);

  if (rpl_mod->ref_pic_list_modification_flag_l0) {
860
    for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
861
      READ_UINT32 (nr, rpl_mod->list_entry_l0[i], n);
862
      CHECK_ALLOWED_MAX (rpl_mod->list_entry_l0[i], (NumPocTotalCurr - 1));
863 864 865 866 867 868 869
    }
  }
  if (GST_H265_IS_B_SLICE (slice)) {
    READ_UINT8 (nr, rpl_mod->ref_pic_list_modification_flag_l1, 1);
    if (rpl_mod->ref_pic_list_modification_flag_l1)
      for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++) {
        READ_UINT32 (nr, rpl_mod->list_entry_l1[i], n);
870
        CHECK_ALLOWED_MAX (rpl_mod->list_entry_l1[i], (NumPocTotalCurr - 1));
871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892
      }
  }

  return TRUE;

error:
  GST_WARNING ("error parsing \"Prediction weight table\"");
  return FALSE;
}

static gboolean
gst_h265_slice_parse_pred_weight_table (GstH265SliceHdr * slice, NalReader * nr)
{
  GstH265PredWeightTable *p;
  gint i, j;
  GstH265PPS *pps = slice->pps;
  GstH265SPS *sps = pps->sps;

  GST_DEBUG ("parsing \"Prediction weight table\"");

  p = &slice->pred_weight_table;

893
  READ_UE_MAX (nr, p->luma_log2_weight_denom, 7);
894

895 896 897 898
  if (sps->chroma_format_idc != 0) {
    READ_SE_ALLOWED (nr, p->delta_chroma_log2_weight_denom,
        (0 - p->luma_log2_weight_denom), (7 - p->luma_log2_weight_denom));
  }
899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956

  for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++)
    READ_UINT8 (nr, p->luma_weight_l0_flag[i], 1);

  if (sps->chroma_format_idc != 0)
    for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++)
      READ_UINT8 (nr, p->chroma_weight_l0_flag[i], 1);

  for (i = 0; i <= slice->num_ref_idx_l0_active_minus1; i++) {
    if (p->luma_weight_l0_flag[i]) {
      READ_SE_ALLOWED (nr, p->delta_luma_weight_l0[i], -128, 127);
      READ_SE_ALLOWED (nr, p->luma_offset_l0[i], -128, 127);
    }
    if (p->chroma_weight_l0_flag[i])
      for (j = 0; j < 2; j++) {
        READ_SE_ALLOWED (nr, p->delta_chroma_weight_l0[i][j], -128, 127);
        READ_SE_ALLOWED (nr, p->delta_chroma_offset_l0[i][j], -512, 511);
      }
  }

  if (GST_H265_IS_B_SLICE (slice)) {
    for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++)
      READ_UINT8 (nr, p->luma_weight_l1_flag[i], 1);
    if (sps->chroma_format_idc != 0)
      for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++)
        READ_UINT8 (nr, p->chroma_weight_l1_flag[i], 1);

    for (i = 0; i <= slice->num_ref_idx_l1_active_minus1; i++) {
      if (p->luma_weight_l1_flag[i]) {
        READ_SE_ALLOWED (nr, p->delta_luma_weight_l1[i], -128, 127);
        READ_SE_ALLOWED (nr, p->luma_offset_l1[i], -128, 127);
      }
      if (p->chroma_weight_l1_flag[i])
        for (j = 0; j < 2; j++) {
          READ_SE_ALLOWED (nr, p->delta_chroma_weight_l1[i][j], -128, 127);
          READ_SE_ALLOWED (nr, p->delta_chroma_offset_l1[i][j], -512, 511);
        }
    }
  }

  return TRUE;

error:
  GST_WARNING ("error parsing \"Prediction weight table\"");
  return FALSE;
}

static GstH265ParserResult
gst_h265_parser_parse_buffering_period (GstH265Parser * parser,
    GstH265BufferingPeriod * per, NalReader * nr)
{
  GstH265SPS *sps;
  guint8 sps_id;
  guint i;
  guint n;

  GST_DEBUG ("parsing \"Buffering period\"");

957
  READ_UE_MAX (nr, sps_id, GST_H265_MAX_SPS_COUNT - 1);
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
  sps = gst_h265_parser_get_sps (parser, sps_id);
  if (!sps) {
    GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
        sps_id);
    return GST_H265_PARSER_BROKEN_LINK;
  }
  per->sps = sps;

  if (sps->vui_parameters_present_flag) {
    GstH265VUIParams *vui = &sps->vui_params;
    GstH265HRDParams *hrd = &vui->hrd_params;

    if (!hrd->sub_pic_hrd_params_present_flag)
      READ_UINT8 (nr, per->irap_cpb_params_present_flag, 1);

    if (per->irap_cpb_params_present_flag) {
      READ_UINT8 (nr, per->cpb_delay_offset,
          (hrd->au_cpb_removal_delay_length_minus1 + 1));
      READ_UINT8 (nr, per->dpb_delay_offset,
          (hrd->dpb_output_delay_length_minus1 + 1));
    }

    n = hrd->initial_cpb_removal_delay_length_minus1 + 1;

    READ_UINT8 (nr, per->concatenation_flag, 1);
    READ_UINT8 (nr, per->au_cpb_removal_delay_delta_minus1,
        (hrd->au_cpb_removal_delay_length_minus1 + 1));

    if (hrd->nal_hrd_parameters_present_flag) {
      for (i = 0; i <= hrd->cpb_cnt_minus1[i]; i++) {
        READ_UINT8 (nr, per->nal_initial_cpb_removal_delay[i], n);
        READ_UINT8 (nr, per->nal_initial_cpb_removal_offset[i], n);
        if (hrd->sub_pic_hrd_params_present_flag
            || per->irap_cpb_params_present_flag) {
          READ_UINT8 (nr, per->nal_initial_alt_cpb_removal_delay[i], n);
          READ_UINT8 (nr, per->nal_initial_alt_cpb_removal_offset[i], n);
        }
      }
    }

    if (hrd->vcl_hrd_parameters_present_flag) {
      for (i = 0; i <= hrd->cpb_cnt_minus1[i]; i++) {
        READ_UINT8 (nr, per->vcl_initial_cpb_removal_delay[i], n);
        READ_UINT8 (nr, per->vcl_initial_cpb_removal_offset[i], n);
        if (hrd->sub_pic_hrd_params_present_flag
            || per->irap_cpb_params_present_flag) {
          READ_UINT8 (nr, per->vcl_initial_alt_cpb_removal_delay[i], n);
          READ_UINT8 (nr, per->vcl_initial_alt_cpb_removal_offset[i], n);
        }
      }
    }

  }
  return GST_H265_PARSER_OK;

error:
  GST_WARNING ("error parsing \"Buffering period\"");
  return GST_H265_PARSER_ERROR;
}

static GstH265ParserResult
gst_h265_parser_parse_pic_timing (GstH265Parser * parser,
    GstH265PicTiming * tim, NalReader * nr)
{
  GstH265ProfileTierLevel *profile_tier_level;
  guint i;

  GST_DEBUG ("parsing \"Picture timing\"");
  if (!parser->last_sps || !parser->last_sps->valid) {
    GST_WARNING ("didn't get the associated sequence paramater set for the "
        "current access unit");
    goto error;
  }

  profile_tier_level = &parser->last_sps->profile_tier_level;

  /* set default values */
  if (!profile_tier_level->progressive_source_flag
      && profile_tier_level->interlaced_source_flag)
    tim->source_scan_type = 0;
  else if (profile_tier_level->progressive_source_flag
      && !profile_tier_level->interlaced_source_flag)
    tim->source_scan_type = 1;
  else
    tim->source_scan_type = 2;

  if (parser->last_sps->vui_parameters_present_flag) {
    GstH265VUIParams *vui = &parser->last_sps->vui_params;

    if (vui->frame_field_info_present_flag) {
      READ_UINT8 (nr, tim->pic_struct, 4);
      READ_UINT8 (nr, tim->source_scan_type, 2);
      READ_UINT8 (nr, tim->duplicate_flag, 1);
    } else {
      /* set default values */
      tim->pic_struct = 0;
    }

    if (vui->hrd_parameters_present_flag) {
      GstH265HRDParams *hrd = &vui->hrd_params;

      READ_UINT8 (nr, tim->au_cpb_removal_delay_minus1,
          (hrd->au_cpb_removal_delay_length_minus1 + 1));
      READ_UINT8 (nr, tim->pic_dpb_output_delay,
          (hrd->dpb_output_delay_length_minus1 + 1));

      if (hrd->sub_pic_hrd_params_present_flag)
        READ_UINT8 (nr, tim->pic_dpb_output_du_delay,
            (hrd->dpb_output_delay_du_length_minus1 + 1));

      if (hrd->sub_pic_hrd_params_present_flag
          && hrd->sub_pic_cpb_params_in_pic_timing_sei_flag) {
        READ_UE (nr, tim->num_decoding_units_minus1);

        READ_UINT8 (nr, tim->du_common_cpb_removal_delay_flag, 1);
        if (tim->du_common_cpb_removal_delay_flag)
          READ_UINT8 (nr, tim->du_common_cpb_removal_delay_increment_minus1,
              (hrd->du_cpb_removal_delay_increment_length_minus1 + 1));

        tim->num_nalus_in_du_minus1 =
            g_new0 (guint32, (tim->num_decoding_units_minus1 + 1));
        tim->du_cpb_removal_delay_increment_minus1 =
            g_new0 (guint8, (tim->num_decoding_units_minus1 + 1));

        for (i = 0; i <= (tim->num_decoding_units_minus1 + 1); i++) {
          READ_UE (nr, tim->num_nalus_in_du_minus1[i]);

          if (!tim->du_common_cpb_removal_delay_flag
              && (i < tim->num_decoding_units_minus1))
            READ_UINT8 (nr, tim->du_cpb_removal_delay_increment_minus1[i],
                (hrd->du_cpb_removal_delay_increment_length_minus1 + 1));
        }
      }
    }
  }
  return GST_H265_PARSER_OK;

error:
  GST_WARNING ("error parsing \"Picture timing\"");
  return GST_H265_PARSER_ERROR;
}

/******** API *************/

/**
 * gst_h265_parser_new:
 *
 * Creates a new #GstH265Parser. It should be freed with
 * gst_h265_parser_free after use.
 *
 * Returns: a new #GstH265Parser
 */
GstH265Parser *
gst_h265_parser_new (void)
{
  GstH265Parser *parser;

  parser = g_slice_new0 (GstH265Parser);
  INITIALIZE_DEBUG_CATEGORY;

  return parser;
}

/**
 * gst_h265_parser_free:
 * @parser: the #GstH265Parser to free
 *
 * Frees @parser and sets it to %NULL
 */
void
gst_h265_parser_free (GstH265Parser * parser)
{
  g_slice_free (GstH265Parser, parser);
  parser = NULL;
}

/**
 * gst_h265_parser_identify_nalu_unchecked:
 * @parser: a #GstH265Parser
 * @data: The data to parse
 * @offset: the offset from which to parse @data
 * @size: the size of @data
 * @nalu: The #GstH265NalUnit where to store parsed nal headers
 *
 * Parses @data and fills @nalu from the next nalu data from @data.
 *
 * This differs from @gst_h265_parser_identify_nalu in that it doesn't
 * check whether the packet is complete or not.
 *
 * Note: Only use this function if you already know the provided @data
 * is a complete NALU, else use @gst_h265_parser_identify_nalu.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_identify_nalu_unchecked (GstH265Parser * parser,
    const guint8 * data, guint offset, gsize size, GstH265NalUnit * nalu)
{
  gint off1;

1158 1159
  memset (nalu, 0, sizeof (*nalu));

1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198
  if (size < offset + 4) {
    GST_DEBUG ("Can't parse, buffer has too small size %" G_GSIZE_FORMAT
        ", offset %u", size, offset);
    return GST_H265_PARSER_ERROR;
  }

  off1 = scan_for_start_codes (data + offset, size - offset);

  if (off1 < 0) {
    GST_DEBUG ("No start code prefix in this buffer");
    return GST_H265_PARSER_NO_NAL;
  }

  if (offset + off1 == size - 1) {
    GST_DEBUG ("Missing data to identify nal unit");

    return GST_H265_PARSER_ERROR;
  }

  nalu->sc_offset = offset + off1;

  /* sc might have 2 or 3 0-bytes */
  if (nalu->sc_offset > 0 && data[nalu->sc_offset - 1] == 00)
    nalu->sc_offset--;

  nalu->offset = offset + off1 + 3;
  nalu->data = (guint8 *) data;
  nalu->size = size - nalu->offset;

  if (!gst_h265_parse_nalu_header (nalu)) {
    GST_WARNING ("error parsing \"NAL unit header\"");
    nalu->size = 0;
    return GST_H265_PARSER_BROKEN_DATA;
  }

  nalu->valid = TRUE;

  if (nalu->type == GST_H265_NAL_EOS || nalu->type == GST_H265_NAL_EOB) {
    GST_DEBUG ("end-of-seq or end-of-stream nal found");
1199
    nalu->size = 2;
1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
    return GST_H265_PARSER_OK;
  }

  return GST_H265_PARSER_OK;
}

/**
 * gst_h265_parser_identify_nalu:
 * @parser: a #GstH265Parser
 * @data: The data to parse
 * @offset: the offset from which to parse @data
 * @size: the size of @data
 * @nalu: The #GstH265NalUnit where to store parsed nal headers
 *
 * Parses @data and fills @nalu from the next nalu data from @data
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_identify_nalu (GstH265Parser * parser,
    const guint8 * data, guint offset, gsize size, GstH265NalUnit * nalu)
{
  GstH265ParserResult res;
  gint off2;

  res =
      gst_h265_parser_identify_nalu_unchecked (parser, data, offset, size,
      nalu);

1229
  if (res != GST_H265_PARSER_OK || nalu->size == 2)
1230 1231 1232 1233 1234 1235 1236 1237 1238
    goto beach;

  off2 = scan_for_start_codes (data + nalu->offset, size - nalu->offset);
  if (off2 < 0) {
    GST_DEBUG ("Nal start %d, No end found", nalu->offset);

    return GST_H265_PARSER_NO_NAL_END;
  }

1239 1240 1241 1242
  /* Mini performance improvement:
   * We could have a way to store how many 0s were skipped to avoid
   * parsing them again on the next NAL */
  while (off2 > 0 && data[nalu->offset + off2 - 1] == 00)
1243 1244 1245
    off2--;

  nalu->size = off2;
1246
  if (nalu->size < 3)
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
    return GST_H265_PARSER_BROKEN_DATA;

  GST_DEBUG ("Complete nal found. Off: %d, Size: %d", nalu->offset, nalu->size);

beach:
  return res;
}

/**
 * gst_h265_parser_identify_nalu_hevc:
 * @parser: a #GstH265Parser
 * @data: The data to parse, must be the beging of the Nal unit
 * @offset: the offset from which to parse @data
 * @size: the size of @data
 * @nal_length_size: the size in bytes of the HEVC nal length prefix.
 * @nalu: The #GstH265NalUnit where to store parsed nal headers
 *
 * Parses @data and sets @nalu.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_identify_nalu_hevc (GstH265Parser * parser,
    const guint8 * data, guint offset, gsize size, guint8 nal_length_size,
    GstH265NalUnit * nalu)
{
  GstBitReader br;

1275 1276
  memset (nalu, 0, sizeof (*nalu));

1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386
  if (size < offset + nal_length_size) {
    GST_DEBUG ("Can't parse, buffer has too small size %" G_GSIZE_FORMAT
        ", offset %u", size, offset);
    return GST_H265_PARSER_ERROR;
  }

  size = size - offset;
  gst_bit_reader_init (&br, data + offset, size);

  nalu->size = gst_bit_reader_get_bits_uint32_unchecked (&br,
      nal_length_size * 8);
  nalu->sc_offset = offset;
  nalu->offset = offset + nal_length_size;

  if (size < nalu->size + nal_length_size) {
    nalu->size = 0;

    return GST_H265_PARSER_NO_NAL_END;
  }

  nalu->data = (guint8 *) data;

  if (!gst_h265_parse_nalu_header (nalu)) {
    GST_WARNING ("error parsing \"NAL unit header\"");
    nalu->size = 0;
    return GST_H265_PARSER_BROKEN_DATA;
  }

  if (nalu->size < 2)
    return GST_H265_PARSER_BROKEN_DATA;

  nalu->valid = TRUE;

  return GST_H265_PARSER_OK;
}

/**
 * gst_h265_parser_parse_nal:
 * @parser: a #GstH265Parser
 * @nalu: The #GstH265NalUnit to parse
 *
 * This function should be called in the case one doesn't need to
 * parse a specific structure. It is necessary to do so to make
 * sure @parser is up to date.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_parse_nal (GstH265Parser * parser, GstH265NalUnit * nalu)
{
  GstH265VPS vps;
  GstH265SPS sps;
  GstH265PPS pps;

  switch (nalu->type) {
    case GST_H265_NAL_VPS:
      return gst_h265_parser_parse_vps (parser, nalu, &vps);
      break;
    case GST_H265_NAL_SPS:
      return gst_h265_parser_parse_sps (parser, nalu, &sps, FALSE);
      break;
    case GST_H265_NAL_PPS:
      return gst_h265_parser_parse_pps (parser, nalu, &pps);
  }

  return GST_H265_PARSER_OK;
}

/**
 * gst_h265_parser_parse_vps:
 * @parser: a #GstH265Parser
 * @nalu: The #GST_H265_NAL_VPS #GstH265NalUnit to parse
 * @vps: The #GstH265VPS to fill.
 *
 * Parses @data, and fills the @vps structure.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_parse_vps (GstH265Parser * parser, GstH265NalUnit * nalu,
    GstH265VPS * vps)
{
  GstH265ParserResult res = gst_h265_parse_vps (nalu, vps);

  if (res == GST_H265_PARSER_OK) {
    GST_DEBUG ("adding video parameter set with id: %d to array", vps->id);

    parser->vps[vps->id] = *vps;
    parser->last_vps = &parser->vps[vps->id];
  }

  return res;
}

/**
 * gst_h265_parse_vps:
 * @nalu: The #GST_H265_NAL_VPS #GstH265NalUnit to parse
 * @sps: The #GstH265VPS to fill.
 *
 * Parses @data, and fills the @vps structure.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parse_vps (GstH265NalUnit * nalu, GstH265VPS * vps)
{
  NalReader nr;
  guint i, j;

  INITIALIZE_DEBUG_CATEGORY;
1387
  GST_DEBUG ("parsing VPS");
1388 1389 1390 1391

  nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
      nalu->size - nalu->header_bytes);

1392 1393
  memset (vps, 0, sizeof (*vps));

1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418
  vps->cprms_present_flag = 1;

  READ_UINT8 (&nr, vps->id, 4);

  /* skip reserved_three_2bits */
  if (!nal_reader_skip (&nr, 2))
    goto error;

  READ_UINT8 (&nr, vps->max_layers_minus1, 6);
  READ_UINT8 (&nr, vps->max_sub_layers_minus1, 3);
  READ_UINT8 (&nr, vps->temporal_id_nesting_flag, 1);

  /* skip reserved_0xffff_16bits */
  if (!nal_reader_skip (&nr, 16))
    goto error;

  if (!gst_h265_parse_profile_tier_level (&vps->profile_tier_level, &nr,
          vps->max_sub_layers_minus1))
    goto error;

  READ_UINT8 (&nr, vps->sub_layer_ordering_info_present_flag, 1);

  for (i =
      (vps->sub_layer_ordering_info_present_flag ? 0 :
          vps->max_sub_layers_minus1); i <= vps->max_sub_layers_minus1; i++) {
1419 1420
    READ_UE_MAX (&nr, vps->max_dec_pic_buffering_minus1[i], G_MAXUINT32 - 1);
    READ_UE_MAX (&nr, vps->max_num_reorder_pics[i],
1421
        vps->max_dec_pic_buffering_minus1[i]);
1422
    READ_UE_MAX (&nr, vps->max_latency_increase_plus1[i], G_MAXUINT32 - 1);
1423 1424
  }
  /* setting default values if vps->sub_layer_ordering_info_present_flag is zero */
1425
  if (!vps->sub_layer_ordering_info_present_flag && vps->max_sub_layers_minus1) {
1426 1427 1428
    for (i = 0; i <= (vps->max_sub_layers_minus1 - 1); i++) {
      vps->max_dec_pic_buffering_minus1[i] =
          vps->max_dec_pic_buffering_minus1[vps->max_sub_layers_minus1];
1429 1430
      vps->max_num_reorder_pics[i] =
          vps->max_num_reorder_pics[vps->max_sub_layers_minus1];
1431 1432 1433 1434 1435 1436
      vps->max_latency_increase_plus1[i] =
          vps->max_latency_increase_plus1[vps->max_sub_layers_minus1];
    }
  }

  READ_UINT8 (&nr, vps->max_layer_id, 6);
1437
  CHECK_ALLOWED_MAX (vps->max_layer_id, 0);
1438

1439
  READ_UE_MAX (&nr, vps->num_layer_sets_minus1, 1023);
1440
  CHECK_ALLOWED_MAX (vps->num_layer_sets_minus1, 0);
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453

  for (i = 1; i <= vps->num_layer_sets_minus1; i++)
    for (j = 0; j <= vps->max_layer_id; j++)
      nal_reader_skip (&nr, 1);

  READ_UINT8 (&nr, vps->timing_info_present_flag, 1);

  if (vps->timing_info_present_flag) {
    READ_UINT32 (&nr, vps->num_units_in_tick, 32);
    READ_UINT32 (&nr, vps->time_scale, 32);
    READ_UINT8 (&nr, vps->poc_proportional_to_timing_flag, 1);

    if (vps->poc_proportional_to_timing_flag)
1454
      READ_UE_MAX (&nr, vps->num_ticks_poc_diff_one_minus1, G_MAXUINT32 - 1);
1455

1456
    READ_UE_MAX (&nr, vps->num_hrd_parameters, 1024);
1457
    CHECK_ALLOWED_MAX (vps->num_hrd_parameters, 1);
1458

1459
    if (vps->num_hrd_parameters) {
1460
      READ_UE_MAX (&nr, vps->hrd_layer_set_idx, 1023);
1461
      CHECK_ALLOWED_MAX (vps->hrd_layer_set_idx, 0);
1462

1463 1464 1465 1466
      if (!gst_h265_parse_hrd_parameters (&vps->hrd_params, &nr,
              vps->cprms_present_flag, vps->max_sub_layers_minus1))
        goto error;
    }
1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525
  }
  READ_UINT8 (&nr, vps->vps_extension, 1);
  vps->valid = TRUE;

  return GST_H265_PARSER_OK;

error:
  GST_WARNING ("error parsing \"Video parameter set\"");
  vps->valid = FALSE;
  return GST_H265_PARSER_ERROR;
}

/**
 * gst_h265_parser_parse_sps:
 * @parser: a #GstH265Parser
 * @nalu: The #GST_H265_NAL_SPS #GstH265NalUnit to parse
 * @sps: The #GstH265SPS to fill.
 * @parse_vui_params: Whether to parse the vui_params or not
 *
 * Parses @data, and fills the @sps structure.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_parse_sps (GstH265Parser * parser, GstH265NalUnit * nalu,
    GstH265SPS * sps, gboolean parse_vui_params)
{
  GstH265ParserResult res =
      gst_h265_parse_sps (parser, nalu, sps, parse_vui_params);

  if (res == GST_H265_PARSER_OK) {
    GST_DEBUG ("adding sequence parameter set with id: %d to array", sps->id);

    parser->sps[sps->id] = *sps;
    parser->last_sps = &parser->sps[sps->id];
  }

  return res;
}

/**
 * gst_h265_parse_sps:
 * parser: The #GstH265Parser
 * @nalu: The #GST_H265_NAL_SPS #GstH265NalUnit to parse
 * @sps: The #GstH265SPS to fill.
 * @parse_vui_params: Whether to parse the vui_params or not
 *
 * Parses @data, and fills the @sps structure.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parse_sps (GstH265Parser * parser, GstH265NalUnit * nalu,
    GstH265SPS * sps, gboolean parse_vui_params)
{
  NalReader nr;
  GstH265VPS *vps;
  guint8 vps_id;
  guint i;
1526 1527
  guint subwc[] = { 1, 2, 2, 1, 1 };
  guint subhc[] = { 1, 2, 1, 1, 1 };
1528 1529 1530 1531 1532 1533 1534 1535
  GstH265VUIParams *vui = NULL;

  INITIALIZE_DEBUG_CATEGORY;
  GST_DEBUG ("parsing SPS");

  nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
      nalu->size - nalu->header_bytes);

1536
  memset (sps, 0, sizeof (*sps));
1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552

  READ_UINT8 (&nr, vps_id, 4);
  vps = gst_h265_parser_get_vps (parser, vps_id);
  if (!vps) {
    GST_DEBUG ("couldn't find associated video parameter set with id: %d",
        vps_id);
  }
  sps->vps = vps;

  READ_UINT8 (&nr, sps->max_sub_layers_minus1, 3);
  READ_UINT8 (&nr, sps->temporal_id_nesting_flag, 1);

  if (!gst_h265_parse_profile_tier_level (&sps->profile_tier_level, &nr,
          sps->max_sub_layers_minus1))
    goto error;

1553
  READ_UE_MAX (&nr, sps->id, GST_H265_MAX_SPS_COUNT - 1);
1554

1555
  READ_UE_MAX (&nr, sps->chroma_format_idc, 3);
1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569
  if (sps->chroma_format_idc == 3)
    READ_UINT8 (&nr, sps->separate_colour_plane_flag, 1);

  READ_UE_ALLOWED (&nr, sps->pic_width_in_luma_samples, 1, 16888);
  READ_UE_ALLOWED (&nr, sps->pic_height_in_luma_samples, 1, 16888);

  READ_UINT8 (&nr, sps->conformance_window_flag, 1);
  if (sps->conformance_window_flag) {
    READ_UE (&nr, sps->conf_win_left_offset);
    READ_UE (&nr, sps->conf_win_right_offset);
    READ_UE (&nr, sps->conf_win_top_offset);
    READ_UE (&nr, sps->conf_win_bottom_offset);
  }

1570 1571 1572
  READ_UE_MAX (&nr, sps->bit_depth_luma_minus8, 6);
  READ_UE_MAX (&nr, sps->bit_depth_chroma_minus8, 6);
  READ_UE_MAX (&nr, sps->log2_max_pic_order_cnt_lsb_minus4, 12);
1573 1574 1575 1576 1577

  READ_UINT8 (&nr, sps->sub_layer_ordering_info_present_flag, 1);
  for (i =
      (sps->sub_layer_ordering_info_present_flag ? 0 :
          sps->max_sub_layers_minus1); i <= sps->max_sub_layers_minus1; i++) {
1578 1579
    READ_UE_MAX (&nr, sps->max_dec_pic_buffering_minus1[i], 16);
    READ_UE_MAX (&nr, sps->max_num_reorder_pics[i],
1580
        sps->max_dec_pic_buffering_minus1[i]);
1581
    READ_UE_MAX (&nr, sps->max_latency_increase_plus1[i], G_MAXUINT32 - 1);
1582 1583
  }
  /* setting default values if sps->sub_layer_ordering_info_present_flag is zero */
1584
  if (!sps->sub_layer_ordering_info_present_flag && sps->max_sub_layers_minus1) {
1585 1586 1587
    for (i = 0; i <= (sps->max_sub_layers_minus1 - 1); i++) {
      sps->max_dec_pic_buffering_minus1[i] =
          sps->max_dec_pic_buffering_minus1[sps->max_sub_layers_minus1];
1588 1589
      sps->max_num_reorder_pics[i] =
          sps->max_num_reorder_pics[sps->max_sub_layers_minus1];
1590 1591 1592 1593 1594 1595 1596
      sps->max_latency_increase_plus1[i] =
          sps->max_latency_increase_plus1[sps->max_sub_layers_minus1];
    }
  }

  /* The limits are calculted based on the profile_tier_level constraint
   * in Annex-A: CtbLog2SizeY = 4 to 6 */
1597 1598 1599 1600 1601 1602
  READ_UE_MAX (&nr, sps->log2_min_luma_coding_block_size_minus3, 3);
  READ_UE_MAX (&nr, sps->log2_diff_max_min_luma_coding_block_size, 6);
  READ_UE_MAX (&nr, sps->log2_min_transform_block_size_minus2, 3);
  READ_UE_MAX (&nr, sps->log2_diff_max_min_transform_block_size, 3);
  READ_UE_MAX (&nr, sps->max_transform_hierarchy_depth_inter, 4);
  READ_UE_MAX (&nr, sps->max_transform_hierarchy_depth_intra, 4);
1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619

  READ_UINT8 (&nr, sps->scaling_list_enabled_flag, 1);
  if (sps->scaling_list_enabled_flag) {
    READ_UINT8 (&nr, sps->scaling_list_data_present_flag, 1);

    if (sps->scaling_list_data_present_flag)
      if (!gst_h265_parser_parse_scaling_lists (&nr, &sps->scaling_list, FALSE))
        goto error;
  }

  READ_UINT8 (&nr, sps->amp_enabled_flag, 1);
  READ_UINT8 (&nr, sps->sample_adaptive_offset_enabled_flag, 1);
  READ_UINT8 (&nr, sps->pcm_enabled_flag, 1);

  if (sps->pcm_enabled_flag) {
    READ_UINT8 (&nr, sps->pcm_sample_bit_depth_luma_minus1, 4);
    READ_UINT8 (&nr, sps->pcm_sample_bit_depth_chroma_minus1, 4);
1620 1621
    READ_UE_MAX (&nr, sps->log2_min_pcm_luma_coding_block_size_minus3, 2);
    READ_UE_MAX (&nr, sps->log2_diff_max_min_pcm_luma_coding_block_size, 2);
1622 1623 1624
    READ_UINT8 (&nr, sps->pcm_loop_filter_disabled_flag, 1);
  }

1625
  READ_UE_MAX (&nr, sps->num_short_term_ref_pic_sets, 64);
1626 1627 1628 1629 1630 1631 1632
  for (i = 0; i < sps->num_short_term_ref_pic_sets; i++)
    if (!gst_h265_parser_parse_short_term_ref_pic_sets
        (&sps->short_term_ref_pic_set[i], &nr, i, sps))
      goto error;

  READ_UINT8 (&nr, sps->long_term_ref_pics_present_flag, 1);
  if (sps->long_term_ref_pics_present_flag) {
1633
    READ_UE_MAX (&nr, sps->num_long_term_ref_pics_sps, 32);
1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653
    for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
      READ_UINT16 (&nr, sps->lt_ref_pic_poc_lsb_sps[i],
          sps->log2_max_pic_order_cnt_lsb_minus4 + 4);
      READ_UINT8 (&nr, sps->used_by_curr_pic_lt_sps_flag[i], 1);
    }
  }

  READ_UINT8 (&nr, sps->temporal_mvp_enabled_flag, 1);
  READ_UINT8 (&nr, sps->strong_intra_smoothing_enabled_flag, 1);
  READ_UINT8 (&nr, sps->vui_parameters_present_flag, 1);

  if (sps->vui_parameters_present_flag && parse_vui_params) {
    if (!gst_h265_parse_vui_parameters (sps, &nr))
      goto error;
    vui = &sps->vui_params;
  }

  READ_UINT8 (&nr, sps->sps_extension_flag, 1);

  /* calculate ChromaArrayType */
1654
  if (!sps->separate_colour_plane_flag)
1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
    sps->chroma_array_type = sps->chroma_format_idc;

  /* Calculate  width and height */
  sps->width = sps->pic_width_in_luma_samples;
  sps->height = sps->pic_height_in_luma_samples;
  if (sps->width < 0 || sps->height < 0) {
    GST_WARNING ("invalid width/height in SPS");
    goto error;
  }

1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678
  if (sps->conformance_window_flag) {
    const guint crop_unit_x = subwc[sps->chroma_format_idc];
    const guint crop_unit_y = subhc[sps->chroma_format_idc];

    sps->crop_rect_width = sps->width -
        (sps->conf_win_left_offset + sps->conf_win_right_offset) * crop_unit_x;
    sps->crop_rect_height = sps->height -
        (sps->conf_win_top_offset + sps->conf_win_bottom_offset) * crop_unit_y;
    sps->crop_rect_x = sps->conf_win_left_offset * crop_unit_x;
    sps->crop_rect_y = sps->conf_win_top_offset * crop_unit_y;

    GST_LOG ("crop_rectangle x=%u y=%u width=%u, height=%u", sps->crop_rect_x,
        sps->crop_rect_y, sps->crop_rect_width, sps->crop_rect_height);
  }
1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724

  sps->fps_num = 0;
  sps->fps_den = 1;

  if (vui && vui->timing_info_present_flag) {
    /* derive framerate for progressive stream if the pic_struct
     * syntax element is not present in picture timing SEI messages */
    /* Fixme: handle other cases also */
    if (parse_vui_params && vui->timing_info_present_flag
        && !vui->field_seq_flag && !vui->frame_field_info_present_flag) {
      sps->fps_num = vui->time_scale;
      sps->fps_den = vui->num_units_in_tick;
      GST_LOG ("framerate %d/%d", sps->fps_num, sps->fps_den);
    }
  } else {
    GST_LOG ("No VUI, unknown framerate");
  }

  sps->valid = TRUE;

  return GST_H265_PARSER_OK;

error:
  GST_WARNING ("error parsing \"Sequence parameter set\"");
  sps->valid = FALSE;
  return GST_H265_PARSER_ERROR;
}

/**
 * gst_h265_parse_pps:
 * @parser: a #GstH265Parser
 * @nalu: The #GST_H265_NAL_PPS #GstH265NalUnit to parse
 * @pps: The #GstH265PPS to fill.
 *
 * Parses @data, and fills the @pps structure.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parse_pps (GstH265Parser * parser, GstH265NalUnit * nalu,
    GstH265PPS * pps)
{
  NalReader nr;
  GstH265SPS *sps;
  gint sps_id;
  gint qp_bd_offset;
1725
  guint32 CtbSizeY, MinCbLog2SizeY, CtbLog2SizeY;
1726 1727 1728 1729 1730 1731 1732 1733
  guint8 i;

  INITIALIZE_DEBUG_CATEGORY;
  GST_DEBUG ("parsing PPS");

  nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
      nalu->size - nalu->header_bytes);

1734 1735
  memset (pps, 0, sizeof (*pps));

1736 1737
  READ_UE_MAX (&nr, pps->id, GST_H265_MAX_PPS_COUNT - 1);
  READ_UE_MAX (&nr, sps_id, GST_H265_MAX_SPS_COUNT - 1);
1738 1739 1740 1741 1742 1743 1744 1745 1746 1747

  sps = gst_h265_parser_get_sps (parser, sps_id);
  if (!sps) {
    GST_WARNING ("couldn't find associated sequence parameter set with id: %d",
        sps_id);
    return GST_H265_PARSER_BROKEN_LINK;
  }
  pps->sps = sps;
  qp_bd_offset = 6 * sps->bit_depth_luma_minus8;

1748 1749 1750 1751 1752 1753 1754 1755
  MinCbLog2SizeY = sps->log2_min_luma_coding_block_size_minus3 + 3;
  CtbLog2SizeY = MinCbLog2SizeY + sps->log2_diff_max_min_luma_coding_block_size;
  CtbSizeY = 1 << CtbLog2SizeY;
  pps->PicHeightInCtbsY =
      ceil ((gdouble) sps->pic_height_in_luma_samples / (gdouble) CtbSizeY);
  pps->PicWidthInCtbsY =
      ceil ((gdouble) sps->pic_width_in_luma_samples / (gdouble) CtbSizeY);

1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766
  /* set default values for fields that might not be present in the bitstream
     and have valid defaults */
  pps->uniform_spacing_flag = 1;
  pps->loop_filter_across_tiles_enabled_flag = 1;

  READ_UINT8 (&nr, pps->dependent_slice_segments_enabled_flag, 1);
  READ_UINT8 (&nr, pps->output_flag_present_flag, 1);
  READ_UINT8 (&nr, pps->num_extra_slice_header_bits, 3);
  READ_UINT8 (&nr, pps->sign_data_hiding_enabled_flag, 1);
  READ_UINT8 (&nr, pps->cabac_init_present_flag, 1);

1767 1768
  READ_UE_MAX (&nr, pps->num_ref_idx_l0_default_active_minus1, 14);
  READ_UE_MAX (&nr, pps->num_ref_idx_l1_default_active_minus1, 14);
1769 1770 1771 1772 1773 1774 1775
  READ_SE_ALLOWED (&nr, pps->init_qp_minus26, -(26 + qp_bd_offset), 25);

  READ_UINT8 (&nr, pps->constrained_intra_pred_flag, 1);
  READ_UINT8 (&nr, pps->transform_skip_enabled_flag, 1);

  READ_UINT8 (&nr, pps->cu_qp_delta_enabled_flag, 1);
  if (pps->cu_qp_delta_enabled_flag)
1776
    READ_UE_MAX (&nr, pps->diff_cu_qp_delta_depth,
1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789
        sps->log2_diff_max_min_luma_coding_block_size);

  READ_SE_ALLOWED (&nr, pps->cb_qp_offset, -12, 12);
  READ_SE_ALLOWED (&nr, pps->cr_qp_offset, -12, 12);

  READ_UINT8 (&nr, pps->slice_chroma_qp_offsets_present_flag, 1);
  READ_UINT8 (&nr, pps->weighted_pred_flag, 1);
  READ_UINT8 (&nr, pps->weighted_bipred_flag, 1);
  READ_UINT8 (&nr, pps->transquant_bypass_enabled_flag, 1);
  READ_UINT8 (&nr, pps->tiles_enabled_flag, 1);
  READ_UINT8 (&nr, pps->entropy_coding_sync_enabled_flag, 1);

  if (pps->tiles_enabled_flag) {
1790 1791
    READ_UE_ALLOWED (&nr, pps->num_tile_columns_minus1, 0, 19);
    READ_UE_ALLOWED (&nr, pps->num_tile_rows_minus1, 0, 21);
1792 1793

    READ_UINT8 (&nr, pps->uniform_spacing_flag, 1);
1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811
    /* 6.5.1, 6-4, 6-5, 7.4.3.3.1 */
    if (pps->uniform_spacing_flag) {
      guint8 num_col = pps->num_tile_columns_minus1 + 1;
      guint8 num_row = pps->num_tile_rows_minus1 + 1;
      for (i = 0; i < num_col; i++) {
        pps->column_width_minus1[i] =
            ((i + 1) * pps->PicWidthInCtbsY / num_col
            - i * pps->PicWidthInCtbsY / num_col) - 1;
      }
      for (i = 0; i < num_row; i++) {
        pps->row_height_minus1[i] =
            ((i + 1) * pps->PicHeightInCtbsY / num_row
            - i * pps->PicHeightInCtbsY / num_row) - 1;
      }
    } else {
      pps->column_width_minus1[pps->num_tile_columns_minus1] =
          pps->PicWidthInCtbsY - 1;
      for (i = 0; i < pps->num_tile_columns_minus1; i++) {
1812
        READ_UE (&nr, pps->column_width_minus1[i]);
1813 1814 1815
        pps->column_width_minus1[pps->num_tile_columns_minus1] -=
            (pps->column_width_minus1[i] + 1);
      }
1816

1817 1818 1819
      pps->row_height_minus1[pps->num_tile_rows_minus1] =
          pps->PicHeightInCtbsY - 1;
      for (i = 0; i < pps->num_tile_rows_minus1; i++) {
1820
        READ_UE (&nr, pps->row_height_minus1[i]);
1821 1822 1823
        pps->row_height_minus1[pps->num_tile_rows_minus1] -=
            (pps->row_height_minus1[i] + 1);
      }
1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850
    }
    READ_UINT8 (&nr, pps->loop_filter_across_tiles_enabled_flag, 1);
  }

  READ_UINT8 (&nr, pps->loop_filter_across_slices_enabled_flag, 1);

  READ_UINT8 (&nr, pps->deblocking_filter_control_present_flag, 1);
  if (pps->deblocking_filter_control_present_flag) {
    READ_UINT8 (&nr, pps->deblocking_filter_override_enabled_flag, 1);

    READ_UINT8 (&nr, pps->deblocking_filter_disabled_flag, 1);
    if (!pps->deblocking_filter_disabled_flag) {
      READ_SE_ALLOWED (&nr, pps->beta_offset_div2, -6, 6);
      READ_SE_ALLOWED (&nr, pps->tc_offset_div2, -6, +6);
    }
  }

  READ_UINT8 (&nr, pps->scaling_list_data_present_flag, 1);
  if (pps->scaling_list_data_present_flag)
    if (!gst_h265_parser_parse_scaling_lists (&nr, &pps->scaling_list, FALSE))
      goto error;
  if (sps->scaling_list_enabled_flag && !sps->scaling_list_data_present_flag
      && !pps->scaling_list_data_present_flag)
    if (!gst_h265_parser_parse_scaling_lists (&nr, &pps->scaling_list, TRUE))
      goto error;

  READ_UINT8 (&nr, pps->lists_modification_present_flag, 1);
1851
  READ_UE_MAX (&nr, pps->log2_parallel_merge_level_minus2, 4);
1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914
  READ_UINT8 (&nr, pps->slice_segment_header_extension_present_flag, 1);
  READ_UINT8 (&nr, pps->pps_extension_flag, 1);

  pps->valid = TRUE;
  return GST_H265_PARSER_OK;

error:
  GST_WARNING ("error parsing \"Picture parameter set\"");
  pps->valid = FALSE;
  return GST_H265_PARSER_ERROR;
}

/**
 * gst_h265_parser_parse_pps:
 * @parser: a #GstH265Parser
 * @nalu: The #GST_H265_NAL_PPS #GstH265NalUnit to parse
 * @pps: The #GstH265PPS to fill.
 *
 * Parses @data, and fills the @pps structure.
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_parse_pps (GstH265Parser * parser,
    GstH265NalUnit * nalu, GstH265PPS * pps)
{
  GstH265ParserResult res = gst_h265_parse_pps (parser, nalu, pps);
  if (res == GST_H265_PARSER_OK) {
    GST_DEBUG ("adding picture parameter set with id: %d to array", pps->id);

    parser->pps[pps->id] = *pps;
    parser->last_pps = &parser->pps[pps->id];
  }

  return res;
}

/**
 * gst_h265_parser_parse_slice_hdr:
 * @parser: a #GstH265Parser
 * @nalu: The #GST_H265_NAL_SLICE #GstH265NalUnit to parse
 * @slice: The #GstH265SliceHdr to fill.
 *
 * Parses @data, and fills the @slice structure.
 * The resulting @slice_hdr structure shall be deallocated with
 * gst_h265_slice_hdr_free() when it is no longer needed
 *
 * Returns: a #GstH265ParserResult
 */
GstH265ParserResult
gst_h265_parser_parse_slice_hdr (GstH265Parser * parser,
    GstH265NalUnit * nalu, GstH265SliceHdr * slice)
{
  NalReader nr;
  gint pps_id;
  GstH265PPS *pps;
  GstH265SPS *sps;
  guint i;
  GstH265ShortTermRefPicSet *stRPS = NULL;
  guint32 UsedByCurrPicLt[16];
  guint32 PicSizeInCtbsY;
  gint NumPocTotalCurr = 0;

1915 1916
  memset (slice, 0, sizeof (*slice));

1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932
  if (!nalu->size) {
    GST_DEBUG ("Invalid Nal Unit");
    return GST_H265_PARSER_ERROR;
  }

  nal_reader_init (&nr, nalu->data + nalu->offset + nalu->header_bytes,
      nalu->size - nalu->header_bytes);

  GST_DEBUG ("parsing \"Slice header\", slice type");

  READ_UINT8 (&nr, slice->first_slice_segment_in_pic_flag, 1);

  if (nalu->type >= GST_H265_NAL_SLICE_BLA_W_LP
      && nalu->type <= RESERVED_IRAP_NAL_TYPE_MAX)
    READ_UINT8 (&nr, slice->no_output_of_prior_pics_flag, 1);

1933
  READ_UE_MAX (&nr, pps_id, GST_H265_MAX_PPS_COUNT - 1);
1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949
  pps = gst_h265_parser_get_pps (parser, pps_id);
  if (!pps) {
    GST_WARNING
        ("couldn't find associated picture parameter set with id: %d", pps_id);
    return GST_H265_PARSER_BROKEN_LINK;
  }

  slice->pps = pps;
  sps = pps->sps;
  if (!sps) {
    GST_WARNING
        ("couldn't find associated sequence parameter set with id: %d",
        pps->id);
    return GST_H265_PARSER_BROKEN_LINK;
  }

1950
  PicSizeInCtbsY = pps->PicWidthInCtbsY * pps->PicHeightInCtbsY;
1951 1952 1953 1954
  /* set default values for fields that might not be present in the bitstream
   * and have valid defaults */
  slice->pic_output_flag = 1;
  slice->collocated_from_l0_flag = 1;
1955
  slice->deblocking_filter_disabled_flag = pps->deblocking_filter_disabled_flag;
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972
  slice->beta_offset_div2 = pps->beta_offset_div2;
  slice->tc_offset_div2 = pps->tc_offset_div2;
  slice->loop_filter_across_slices_enabled_flag =
      pps->loop_filter_across_slices_enabled_flag;

  if (!slice->first_slice_segment_in_pic_flag) {
    const guint n = ceil_log2 (PicSizeInCtbsY);

    if (pps->dependent_slice_segments_enabled_flag)
      READ_UINT8 (&nr, slice->dependent_slice_segment_flag, 1);
    /* sice_segment_address parsing */
    READ_UINT32 (&nr, slice->segment_address, n);
  }

  if (!slice->dependent_slice_segment_flag) {
    for (i = 0; i < pps->num_extra_slice_header_bits; i++)
      nal_reader_skip (&nr, 1);
1973
    READ_UE_MAX (&nr, slice->type, 63);
1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994


    if (pps->output_flag_present_flag)
      READ_UINT8 (&nr, slice->pic_output_flag, 1);
    if (sps->separate_colour_plane_flag == 1)
      READ_UINT8 (&nr, slice->colour_plane_id, 2);

    if ((nalu->type != GST_H265_NAL_SLICE_IDR_W_RADL)
        && (nalu->type != GST_H265_NAL_SLICE_IDR_N_LP)) {
      READ_UINT16 (&nr, slice->pic_order_cnt_lsb,
          (sps->log2_max_pic_order_cnt_lsb_minus4 + 4));

      READ_UINT8 (&nr, slice->short_term_ref_pic_set_sps_flag, 1);
      if (!slice->short_term_ref_pic_set_sps_flag) {
        if (!gst_h265_parser_parse_short_term_ref_pic_sets
            (&slice->short_term_ref_pic_sets, &nr,
                sps->num_short_term_ref_pic_sets, sps))
          goto error;
      } else if (sps->num_short_term_ref_pic_sets > 1) {
        const guint n = ceil_log2 (sps->num_short_term_ref_pic_sets);
        READ_UINT8 (&nr, slice->short_term_ref_pic_set_idx, n);
1995
        CHECK_ALLOWED_MAX (slice->short_term_ref_pic_set_idx,
1996 1997 1998 1999 2000 2001 2002
            sps->num_short_term_ref_pic_sets - 1);
      }

      if (sps->long_term_ref_pics_present_flag) {
        guint32 limit;

        if (sps->num_long_term_ref_pics_sps > 0)
2003
          READ_UE_MAX (&nr, slice->num_long_term_sps,
2004 2005
              sps->num_long_term_ref_pics_sps);

2006
        READ_UE_MAX (&nr, slice->num_long_term_pics, 16);
2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043
        limit = slice->num_long_term_sps + slice->num_long_term_pics;
        for (i = 0; i < limit; i++) {
          if (i < slice->num_long_term_sps) {
            if (sps->num_long_term_ref_pics_sps > 1) {
              const guint n = ceil_log2 (sps->num_long_term_ref_pics_sps);
              READ_UINT8 (&nr, slice->lt_idx_sps[i], n);
            }
          } else {
            READ_UINT32 (&nr, slice->poc_lsb_lt[i],
                (sps->log2_max_pic_order_cnt_lsb_minus4 + 4));
            READ_UINT8 (&nr, slice->used_by_curr_pic_lt_flag[i], 1);
          }

          /* calculate UsedByCurrPicLt */
          if (i < slice->num_long_term_sps)
            UsedByCurrPicLt[i] =
                sps->used_by_curr_pic_lt_sps_flag[slice->lt_idx_sps[i]];
          else
            UsedByCurrPicLt[i] = slice->used_by_curr_pic_lt_flag[i];
          READ_UINT8 (&nr, slice->delta_poc_msb_present_flag[i], 1);
          if (slice->delta_poc_msb_present_flag[i])
            READ_UE (&nr, slice->delta_poc_msb_cycle_lt[i]);
        }
      }
      if (sps->temporal_mvp_enabled_flag)
        READ_UINT8 (&nr, slice->temporal_mvp_enabled_flag, 1);
    }

    if (sps->sample_adaptive_offset_enabled_flag) {
      READ_UINT8 (&nr, slice->sao_luma_flag, 1);
      READ_UINT8 (&nr, slice->sao_chroma_flag, 1);
    }

    if (GST_H265_IS_B_SLICE (slice) || GST_H265_IS_P_SLICE (slice)) {
      READ_UINT8 (&nr, slice->num_ref_idx_active_override_flag, 1);

      if (slice->num_ref_idx_active_override_flag) {
2044
        READ_UE_MAX (&nr, slice->num_ref_idx_l0_active_minus1, 14);
2045
        if (GST_H265_IS_B_SLICE (slice))
2046
          READ_UE_MAX (&nr, slice->num_ref_idx_l1_active_minus1, 14);
2047 2048 2049 2050 2051 2052 2053 2054
      } else {
        /*set default values */
        slice->num_ref_idx_l0_active_minus1 =
            pps->num_ref_idx_l0_default_active_minus1;
        slice->num_ref_idx_l1_active_minus1 =
            pps->num_ref_idx_l1_default_active_minus1;
      }

2055 2056
      /* calculate NumPocTotalCurr */
      if (slice->short_term_ref_pic_set_sps_flag)
2057
        stRPS = &sps->short_term_ref_pic_set[slice->short_term_ref_pic_set_idx];
2058
      else
2059 2060
        stRPS = &slice->short_term_ref_pic_sets;

2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072
      for (i = 0; i < stRPS->NumNegativePics; i++)
        if (stRPS->UsedByCurrPicS0[i])
          NumPocTotalCurr++;
      for (i = 0; i < stRPS->NumPositivePics; i++)
        if (stRPS->UsedByCurrPicS1[i])
          NumPocTotalCurr++;
      for (i = 0;
          i < (slice->num_long_term_sps + slice->num_long_term_pics); i++)
        if (UsedByCurrPicLt[i])
          NumPocTotalCurr++;
      slice->NumPocTotalCurr = NumPocTotalCurr;

2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
      if (pps->lists_modification_present_flag) {
        if (NumPocTotalCurr > 1)
          if (!gst_h265_slice_parse_ref_pic_list_modification (slice, &nr,
                  NumPocTotalCurr))
            goto error;
      }

      if (GST_H265_IS_B_SLICE (slice))
        READ_UINT8 (&nr, slice->mvd_l1_zero_flag, 1);
      if (pps->cabac_init_present_flag)
        READ_UINT8 (&nr, slice->cabac_init_flag, 1);
      if (slice->temporal_mvp_enabled_flag) {
        if (GST_H265_IS_B_SLICE (slice))
          READ_UINT8 (&nr, slice->collocated_from_l0_flag, 1);

        if ((slice->collocated_from_l0_flag
                && slice->num_ref_idx_l0_active_minus1 > 0)
            || (!slice->collocated_from_l0_flag
                && slice->num_ref_idx_l1_active_minus1 > 0)) {

          /*fixme: add optimization */